xmerge: remove obsolete xalan stuff from manifest classpath

It appears this came in to make it work with JREs < 1.4, i#58308.

Change-Id: I6974e0fe7b94ecf1b577af064dcce8f017d0a31d

xmerge/Jar_xmerge.mk

@@ -38,13 +38,6 @@ $(eval $(call gb_Jar_use_jars,xmerge,\
 	$(OUTDIR)/bin/juh.jar \
 ))
 
-# FIXME: what is this stuff good for???
-$(eval $(call gb_Jar_add_manifest_classpath,xmerge,\
-	xml-apis.jar \
-	xercesImpl.jar \
-	serializer.jar \
-))
-
 $(eval $(call gb_Jar_set_packageroot,xmerge,org))
 
 $(eval $(call gb_Jar_add_sourcefiles,xmerge,\